Clear measurement grid on sturdy acrylic enables exact markings for crack observation and consistent monitoring Captures both horizontal and vertical movement with straightforward analog technology for steady results Two removable pins allow adjustable setup; records on chart and cursor show movement for accurate data logging Manual 2D tracking provides detailed progress monitoring of wall cracks, measuring development over time for dependable updates Key attributes Function: manual 2D crack tracking on walls Material: sturdy acrylic Marking system: clear measurement grid Data recording: chart and cursor Setup: two removable pins for adjustable alignment Technology: analog, simple and reliable Use scenarios Postconstruction or retrofit monitoring of wall cracks in residential buildings to detect and document progression over time Monitoring of historical or sensitive structures where nondestructive crack observation is preferred Construction site quality control to track crack progression during curing or loading in wall installations